Hydrocarbon Processing - April 2022 - GP-24
PLANT DESIGN, ENGINEERING, CONSTRUCTION AND COMMISSIONING
also receives the amine slurry from the
amine precoat filters. The acid gas removal
process configuration is shown in FIG. 1.
FIG. 2. Frequent strainer cleaning for amine System A.
The stripper is a trays column with
two once-through exchangers that take
feed from the column bottom chimney
tray. Heat for the amine stripper reboilers
is supplied from the low-pressure hot
water system. The gases from the top of
the stripper are cooled in the amine stripper
overhead condenser and water is condensed
in the reflux drum. The acid gas is
routed to the CO2
compression unit. Any
FIG. 3. The progression of water clarity by the
samples collected from amine System A.
organic phase present will be separated in
the reflux drum and manually discharged
to the wet hydrocarbon burn pit.
The reflux pumps return the condensed
water as reflux back to the stripper top tray
and, during the regeneration cycle, partially
to the amine reclaimer. The lean amine
from the stripper bottom is routed toward
the amine contactor by booster pumps.
Before being fed to the contactor, the lean
amine is cooled through the lean/rich
amine exchanger and the lean amine cooler.
The lean amine circulation pumps boost
the pressure and return the lean amine to
the amine contactor. Pumps route a fraction
of the circulating lean amine (~15%)
to the precoat filter package, and filtered
amine is rejoined to the lean amine flow.
The amine reclaimer is provided to
FIG. 4. Dirt accumulation in pump strainers.
the absorber, any amine entrainment is
removed by the counter flow of the water
withdrawn from the amine contactor
top section. The rich amine coming from
the flash drum is heated up through the
lean/rich amine exchangers and fed to the
amine stripper.
24 MARCH/APRIL 2022 | GasProcessingNews.com
periodically regenerate the circulating
amine. A fraction of the circulating lean
amine from the booster pumps (~1% of
total amine pumped flowrate) is fed to
the amine reclaimer. The reclaimer operates
at 360°F (182°C) and controls the
amine solution boiling temperature by an
adequate flowrate of reflux water from the
amine stripper reflux pumps. Amine and
water are recovered to the stripper as vapors
coming from the top of the reclaimer,
while degraded amine components are left
on the vessel bottom. This sludge pond
Amine system process description-
acid gas enrichment unit. The wet
acid gas is first cooled in a cooling water
chiller and then enters an inlet separator
to remove liquid hydrocarbons from the
gas stream. The acid gas then enters the
bottom of the contactor trayed column
and flows upward through the absorber in
intimate countercurrent contact with the
selective amine solution, where the amine
selectively absorbs hydrogen sulfide (H2
S)
acid gas constituents from the gas stream.
Before leaving the contactor, the CO2
gas
passes through a water wash section.
The rich amine solution is sent from
the bottom of the contactor via the rich
amine pump to the lean-rich amine heat
exchanger, before entering the top of the
stripper column. A part of the absorbed
acid gases will be flashed from the heated
rich solution on the top tray of the stripper.
The remainder of the rich solution
flows downward through the stripper in
countercurrent contact with vapor generated
in a steam reboiler. The reboiler vapor
(primarily steam) strips the acid gases
from the rich solution.
The acid gas and the steam leaving the
top of the stripper pass through a condenser,
where the major portion of the steam is
condensed and cooled in an air cooler. The
acid gas is separated in the reflux drum and
sent to the acid gas enrichment unit.
The lean amine solution from the bottom
of the stripper column is pumped by
a booster pump through a lean-rich heat
exchanger and then through air coolers to
the top of the contactor. To ensure cleanliness
of the circulated selective amine solution
in the contactor, a 15% slipstream of
the lean solution is passed through a mechanical
filtration system.
Acceptance criteria for soft startup.
A soft startup can be declared successfully
completed when at least two of the following
three criteria are achieved:
* The frequency of strainer cleaning
is reduced to less than one cleaning
activity per strainer every two days.
* Qualitative proof that water
samples are getting clearer every
operating day for three consecutive
days, then stable/no change for
an additional day.
http://www.GasProcessingNews.com
Hydrocarbon Processing - April 2022
Table of Contents for the Digital Edition of Hydrocarbon Processing - April 2022
Contents
Hydrocarbon Processing - April 2022 - Cover1
Hydrocarbon Processing - April 2022 - Cover2
Hydrocarbon Processing - April 2022 - Contents
Hydrocarbon Processing - April 2022 - 4
Hydrocarbon Processing - April 2022 - 5
Hydrocarbon Processing - April 2022 - 6
Hydrocarbon Processing - April 2022 - 7
Hydrocarbon Processing - April 2022 - 8
Hydrocarbon Processing - April 2022 - 9
Hydrocarbon Processing - April 2022 - 10
Hydrocarbon Processing - April 2022 - 11
Hydrocarbon Processing - April 2022 - 12
Hydrocarbon Processing - April 2022 - 13
Hydrocarbon Processing - April 2022 - 14
Hydrocarbon Processing - April 2022 - 15
Hydrocarbon Processing - April 2022 - 16
Hydrocarbon Processing - April 2022 - 17
Hydrocarbon Processing - April 2022 - 18
Hydrocarbon Processing - April 2022 - 19
Hydrocarbon Processing - April 2022 - 20
Hydrocarbon Processing - April 2022 - 21
Hydrocarbon Processing - April 2022 - 22
Hydrocarbon Processing - April 2022 - 23
Hydrocarbon Processing - April 2022 - 24
Hydrocarbon Processing - April 2022 - 25
Hydrocarbon Processing - April 2022 - 26
Hydrocarbon Processing - April 2022 - 27
Hydrocarbon Processing - April 2022 - 28
Hydrocarbon Processing - April 2022 - 29
Hydrocarbon Processing - April 2022 - 30
Hydrocarbon Processing - April 2022 - 31
Hydrocarbon Processing - April 2022 - 32
Hydrocarbon Processing - April 2022 - 33
Hydrocarbon Processing - April 2022 - 34
Hydrocarbon Processing - April 2022 - 35
Hydrocarbon Processing - April 2022 - 36
Hydrocarbon Processing - April 2022 - 37
Hydrocarbon Processing - April 2022 - 38
Hydrocarbon Processing - April 2022 - 39
Hydrocarbon Processing - April 2022 - 40
Hydrocarbon Processing - April 2022 - 41
Hydrocarbon Processing - April 2022 - 42
Hydrocarbon Processing - April 2022 - 43
Hydrocarbon Processing - April 2022 - 44
Hydrocarbon Processing - April 2022 - 45
Hydrocarbon Processing - April 2022 - 46
Hydrocarbon Processing - April 2022 - 47
Hydrocarbon Processing - April 2022 - 48
Hydrocarbon Processing - April 2022 - 49
Hydrocarbon Processing - April 2022 - 50
Hydrocarbon Processing - April 2022 - 51
Hydrocarbon Processing - April 2022 - 52
Hydrocarbon Processing - April 2022 - 53
Hydrocarbon Processing - April 2022 - 54
Hydrocarbon Processing - April 2022 - 55
Hydrocarbon Processing - April 2022 - 56
Hydrocarbon Processing - April 2022 - 57
Hydrocarbon Processing - April 2022 - 58
Hydrocarbon Processing - April 2022 - 59
Hydrocarbon Processing - April 2022 - 60
Hydrocarbon Processing - April 2022 - 61
Hydrocarbon Processing - April 2022 - 62
Hydrocarbon Processing - April 2022 - 63
Hydrocarbon Processing - April 2022 - 64
Hydrocarbon Processing - April 2022 - 65
Hydrocarbon Processing - April 2022 - 66
Hydrocarbon Processing - April 2022 - 67
Hydrocarbon Processing - April 2022 - 68
Hydrocarbon Processing - April 2022 - 69
Hydrocarbon Processing - April 2022 - 70
Hydrocarbon Processing - April 2022 - 71
Hydrocarbon Processing - April 2022 - 72
Hydrocarbon Processing - April 2022 - 73
Hydrocarbon Processing - April 2022 - 74
Hydrocarbon Processing - April 2022 - 75
Hydrocarbon Processing - April 2022 - 76
Hydrocarbon Processing - April 2022 - 77
Hydrocarbon Processing - April 2022 - 78
Hydrocarbon Processing - April 2022 - 79
Hydrocarbon Processing - April 2022 - 80
Hydrocarbon Processing - April 2022 - 81
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Hydrocarbon Processing - April 2022 - 84
Hydrocarbon Processing - April 2022 - 85
Hydrocarbon Processing - April 2022 - 86
Hydrocarbon Processing - April 2022 - 87
Hydrocarbon Processing - April 2022 - 88
Hydrocarbon Processing - April 2022 - 88A
Hydrocarbon Processing - April 2022 - 88B
Hydrocarbon Processing - April 2022 - 89
Hydrocarbon Processing - April 2022 - 90
Hydrocarbon Processing - April 2022 - Cover3
Hydrocarbon Processing - April 2022 - Cover4
Hydrocarbon Processing - April 2022 - GP-1
Hydrocarbon Processing - April 2022 - GP-2
Hydrocarbon Processing - April 2022 - GP-3
Hydrocarbon Processing - April 2022 - GP-4
Hydrocarbon Processing - April 2022 - GP-5
Hydrocarbon Processing - April 2022 - GP-6
Hydrocarbon Processing - April 2022 - GP-7
Hydrocarbon Processing - April 2022 - GP-8
Hydrocarbon Processing - April 2022 - GP-9
Hydrocarbon Processing - April 2022 - GP-10
Hydrocarbon Processing - April 2022 - GP-11
Hydrocarbon Processing - April 2022 - GP-12
Hydrocarbon Processing - April 2022 - GP-13
Hydrocarbon Processing - April 2022 - GP-14
Hydrocarbon Processing - April 2022 - GP-15
Hydrocarbon Processing - April 2022 - GP-16
Hydrocarbon Processing - April 2022 - GP-17
Hydrocarbon Processing - April 2022 - GP-18
Hydrocarbon Processing - April 2022 - GP-19
Hydrocarbon Processing - April 2022 - GP-20
Hydrocarbon Processing - April 2022 - GP-21
Hydrocarbon Processing - April 2022 - GP-22
Hydrocarbon Processing - April 2022 - GP-23
Hydrocarbon Processing - April 2022 - GP-24
Hydrocarbon Processing - April 2022 - GP-25
Hydrocarbon Processing - April 2022 - GP-26
Hydrocarbon Processing - April 2022 - GP-27
Hydrocarbon Processing - April 2022 - GP-28
Hydrocarbon Processing - April 2022 - GP-29
Hydrocarbon Processing - April 2022 - GP-30
Hydrocarbon Processing - April 2022 - GP-31
Hydrocarbon Processing - April 2022 - GP-32
Hydrocarbon Processing - April 2022 - GP-33
Hydrocarbon Processing - April 2022 - GP-34
Hydrocarbon Processing - April 2022 - GP-35
Hydrocarbon Processing - April 2022 - GP-36
Hydrocarbon Processing - April 2022 - GP-37
Hydrocarbon Processing - April 2022 - GP-38
Hydrocarbon Processing - April 2022 - GP-39
Hydrocarbon Processing - April 2022 - GP-40
Hydrocarbon Processing - April 2022 - GP-41
Hydrocarbon Processing - April 2022 - GP-42
Hydrocarbon Processing - April 2022 - GP-43
Hydrocarbon Processing - April 2022 - GP-44
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